test/threadwin.c
changeset 0 74212992fb08
child 562 cb40b26523a5
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/threadwin.c	Thu Apr 26 16:45:43 2001 +0000
@@ -0,0 +1,307 @@
+
+/* Test out the multi-threaded event handling functions */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "SDL.h"
+#include "SDL_thread.h"
+
+/* Are we done yet? */
+static int done = 0;
+
+/* Is the cursor visible? */
+static int visible = 1;
+
+SDL_Surface *LoadIconSurface(char *file, Uint8 **maskp)
+{
+	SDL_Surface *icon;
+	Uint8       *pixels;
+	Uint8       *mask;
+	int          mlen, i;
+
+	*maskp = NULL;
+
+	/* Load the icon surface */
+	icon = SDL_LoadBMP(file);
+	if ( icon == NULL ) {
+		fprintf(stderr, "Couldn't load %s: %s\n", file, SDL_GetError());
+		return(NULL);
+	}
+
+	/* Check width and height */
+	if ( (icon->w%8) != 0 ) {
+		fprintf(stderr, "Icon width must be a multiple of 8!\n");
+		SDL_FreeSurface(icon);
+		return(NULL);
+	}
+	if ( icon->format->palette == NULL ) {
+		fprintf(stderr, "Icon must have a palette!\n");
+		SDL_FreeSurface(icon);
+		return(NULL);
+	}
+
+	/* Set the colorkey */
+	SDL_SetColorKey(icon, SDL_SRCCOLORKEY, *((Uint8 *)icon->pixels));
+
+	/* Create the mask */
+	pixels = (Uint8 *)icon->pixels;
+	printf("Transparent pixel: (%d,%d,%d)\n",
+				icon->format->palette->colors[*pixels].r,
+				icon->format->palette->colors[*pixels].g,
+				icon->format->palette->colors[*pixels].b);
+	mlen = icon->w*icon->h;
+	mask = (Uint8 *)malloc(mlen/8);
+	if ( mask == NULL ) {
+		fprintf(stderr, "Out of memory!\n");
+		SDL_FreeSurface(icon);
+		return(NULL);
+	}
+	memset(mask, 0, mlen/8);
+	for ( i=0; i<mlen; ) {
+		if ( pixels[i] != *pixels )
+			mask[i/8] |= 0x01;
+		++i;
+		if ( (i%8) != 0 )
+			mask[i/8] <<= 1;
+	}
+	*maskp = mask;
+	return(icon);
+}
+
+int FilterEvents(const SDL_Event *event)
+{
+	static int reallyquit = 0;
+
+	switch (event->type) {
+
+		case SDL_ACTIVEEVENT:
+			/* See what happened */
+			printf("App %s ",
+				event->active.gain ? "gained" : "lost");
+			if ( event->active.state & SDL_APPACTIVE )
+				printf("active ");
+			if ( event->active.state & SDL_APPMOUSEFOCUS )
+				printf("mouse ");
+			if ( event->active.state & SDL_APPINPUTFOCUS )
+				printf("input ");
+			printf("focus\n");
+
+			/* See if we are iconified or restored */
+			if ( event->active.state & SDL_APPACTIVE ) {
+				printf("App has been %s\n",
+					event->active.gain ?
+						 "restored" : "iconified");
+			}
+			return(0);
+
+		/* This is important!  Queue it if we want to quit. */
+		case SDL_QUIT:
+			if ( ! reallyquit ) {
+				reallyquit = 1;
+				printf("Quit requested\n");
+				return(0);
+			}
+			printf("Quit demanded\n");
+			return(1);
+
+		/* Mouse and keyboard events go to threads */
+		case SDL_MOUSEMOTION:
+		case SDL_MOUSEBUTTONDOWN:
+		case SDL_MOUSEBUTTONUP:
+		case SDL_KEYDOWN:
+		case SDL_KEYUP:
+			return(1);
+
+		/* Drop all other events */
+		default:
+			return(0);
+	}
+}
+
+int HandleMouse(void *unused)
+{
+	SDL_Event events[10];
+	int i, found;
+	Uint32 mask;
+
+	/* Handle mouse events here */
+	mask = (SDL_MOUSEMOTIONMASK|SDL_MOUSEBUTTONDOWNMASK|SDL_MOUSEBUTTONUPMASK);
+	while ( ! done ) {
+		found = SDL_PeepEvents(events, 10, SDL_GETEVENT, mask);
+		for ( i=0; i<found; ++i ) {
+			switch(events[i].type) {
+				/* We want to toggle visibility on buttonpress */
+				case SDL_MOUSEBUTTONDOWN:
+				case SDL_MOUSEBUTTONUP:
+					if ( events[i].button.state == SDL_PRESSED ) {
+						visible = !visible;
+						SDL_ShowCursor(visible);
+					}
+					printf("Mouse button %d has been %s\n",
+						events[i].button.button,
+						(events[i].button.state == SDL_PRESSED) ?
+						"pressed" : "released");
+					break;
+				/* Show relative mouse motion */
+				case SDL_MOUSEMOTION:
+					printf("Mouse relative motion: {%d,%d}\n",
+							events[i].motion.xrel, events[i].motion.yrel);
+					break;
+			}
+		}
+		/* Give up some CPU to allow events to arrive */
+		SDL_Delay(20);
+	}
+	return(0);
+}
+
+int HandleKeyboard(void *unused)
+{
+	SDL_Event events[10];
+	int i, found;
+	Uint32 mask;
+
+	/* Handle mouse events here */
+	mask = (SDL_KEYDOWNMASK|SDL_KEYUPMASK);
+	while ( ! done ) {
+		found = SDL_PeepEvents(events, 10, SDL_GETEVENT, mask);
+		for ( i=0; i<found; ++i ) {
+			switch(events[i].type) {
+			    /* We want to toggle visibility on buttonpress */
+			    case SDL_KEYDOWN:
+			    case SDL_KEYUP:
+			    	/* Allow hitting <ESC> to quit the app */
+			    	if ( events[i].key.keysym.sym == SDLK_ESCAPE ) {
+			    		done = 1;
+			    	}
+			    	printf("Key '%c' has been %s\n",
+						events[i].key.keysym.unicode,
+					(events[i].key.state == SDL_PRESSED) ?
+						"pressed" : "released");
+			    	break;
+			}
+		}
+		/* Give up some CPU to allow events to arrive */
+		SDL_Delay(20);
+	}
+	return(0);
+}
+
+int main(int argc, char *argv[])
+{
+	SDL_Surface *screen;
+	SDL_Surface *icon;
+	Uint8 *icon_mask;
+	int i, parsed;
+	Uint8 *buffer;
+	SDL_Color palette[256];
+	Uint32 init_flags;
+	Uint8  video_bpp;
+	Uint32 video_flags;
+	SDL_Thread *mouse_thread;
+	SDL_Thread *keybd_thread;
+
+	/* Set the options, based on command line arguments */
+	init_flags = SDL_INIT_VIDEO;
+	video_bpp = 8;
+	video_flags = SDL_SWSURFACE;
+	parsed = 1;
+	while ( parsed ) {
+		/* If the threaded option is enabled, and the SDL library hasn't
+		   been compiled with threaded events enabled, then the mouse and
+		   keyboard won't respond.
+		 */
+		if ( (argc >= 2) && (strcmp(argv[1], "-threaded") == 0) ) {
+			init_flags |= SDL_INIT_EVENTTHREAD;
+			argc -= 1;
+			argv += 1;
+			printf("Running with threaded events\n");
+		} else
+		if ( (argc >= 2) && (strcmp(argv[1], "-fullscreen") == 0) ) {
+			video_flags |= SDL_FULLSCREEN;
+			argc -= 1;
+			argv += 1;
+		} else
+		if ( (argc >= 3) && (strcmp(argv[1], "-bpp") == 0) ) {
+			video_bpp = atoi(argv[2]);
+			argc -= 2;
+			argv += 2;
+		} else {
+			parsed = 0;
+		}
+	}
+
+	/* Initialize SDL with the requested flags */
+	if ( SDL_Init(init_flags) < 0 ) {
+		fprintf(stderr,
+			"Couldn't initialize SDL: %s\n", SDL_GetError());
+		exit(1);
+	}
+	atexit(SDL_Quit);
+
+	/* Set the icon -- this must be done before the first mode set */
+	icon = LoadIconSurface("icon.bmp", &icon_mask);
+	if ( icon != NULL ) {
+		SDL_WM_SetIcon(icon, icon_mask);
+	}
+	if ( icon_mask != NULL )
+		free(icon_mask);
+
+	/* Initialize the display */
+	screen = SDL_SetVideoMode(640, 480, video_bpp, video_flags);
+	if (  screen == NULL ) {
+		fprintf(stderr, "Couldn't set 640x480x%d video mode: %s\n",
+						video_bpp, SDL_GetError());
+		exit(1);
+	}
+	printf("Running in %s mode\n", screen->flags & SDL_FULLSCREEN ?
+						"fullscreen" : "windowed");
+
+	/* Enable printable characters */
+	SDL_EnableUNICODE(1);
+
+	/* Set an event filter that discards everything but QUIT */
+	SDL_SetEventFilter(FilterEvents);
+
+	/* Create the event handling threads */
+	mouse_thread = SDL_CreateThread(HandleMouse, NULL);
+	keybd_thread = SDL_CreateThread(HandleKeyboard, NULL);
+
+	/* Set the surface pixels and refresh! */
+	for ( i=0; i<256; ++i ) {
+		palette[i].r = 255-i;
+		palette[i].g = 255-i;
+		palette[i].b = 255-i;
+	}
+	SDL_SetColors(screen, palette, 0, 256);
+	if ( SDL_LockSurface(screen) < 0 ) {
+		fprintf(stderr, "Couldn't lock display surface: %s\n",
+							SDL_GetError());
+		exit(2);
+	}
+	buffer = (Uint8 *)screen->pixels;
+	for ( i=0; i<screen->h; ++i ) {
+		memset(buffer,(i*255)/screen->h,
+				screen->w*screen->format->BytesPerPixel);
+		buffer += screen->pitch;
+	}
+	SDL_UnlockSurface(screen);
+	SDL_UpdateRect(screen, 0, 0, 0, 0);
+
+	/* Loop, waiting for QUIT */
+	while ( ! done ) {
+		if ( ! (init_flags & SDL_INIT_EVENTTHREAD) ) {
+			SDL_PumpEvents(); /* Needed when event thread is off */
+		}
+		if ( SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, SDL_QUITMASK) ) {
+			done = 1;
+		}
+		/* Give up some CPU so the events can accumulate */
+		SDL_Delay(20);
+	}
+	SDL_WaitThread(mouse_thread, NULL);
+	SDL_WaitThread(keybd_thread, NULL);
+	return(0);
+}